Heney van hoevenbeegh



H. VAN HOEVENBERGH.

Improvement in PrintingTelegraphs.. .No. 130, 31; Patented Aug. 27,1872.

INVENTOR UNI ED STATES PATENT OFFICE.

HENRY VAN HO'EVENBERGH, OF BROOKLYN, NEW YORK.

[IMPROVEMENT IN, PRlNTlNG-TELEGRAPHS.

To all whom it may concern:

Be it known that I, HENRY VAN HOEVEN- BERGH, of Brooklyn, in the countyof Kings and State of New York,have invented an Improvement inPrinting-Telegraphs, of which the following is a description:

In this telegraph there is an armature-wheel havingarmatures andintermediate spaces, and serving as a motor and a holder or stop to thetype-Wheel. The number of characters or spaces upon the type-wheelcorresponds with the number produced by multiplying the number ofarmatures by the number of electromagnets. The electro-magnets areenergized alternately or in succession, and the pulsations keep up acontinued revolution of the typewheel; but when the current is notbroken in one of the magnets the type-wheel is stopped thereby and helduntil the current is broken and the pulsation sent to the nextelectromagnet. A ratchet-wheel and pawl prevent the type-wheel beingmoved backward or in a wrong direction. The printing is effected by.sending through both helices of a magnet simultaneous pulsations; butsaid printing-magnet is not operative while the type-wheel is beingturned, because the cores in the two helices are not magnetized at thesame time, and the power hence is insufficient to move the armature. Tobring all the type-wheels of the instruments on a circuit into unison aswinging bow is attracted by energizing both type-wheel magnets and thenalternating the pulsations, the bow being held by first one magnet andthen the other; and'this bow stops the further rotation of thetype-wheel at the unison-point. The unison-bow is liberated by openingboth circuits, which has also to be done after printing, to allow theparts to resume their normal position. The paper is held by a stationaryclamp while the printing-lever is moved; hence the paper is drawn alongby that act.

In the drawing, Figure 1 is a'plan of the instrument, and Fig. 2 is aside view of the same.

The printing-magnet is made of the coils or helices a b, with theircores, as usual. The armature 0 and lever d effect the printing. Thetype-wheel .e is upon the shaft f, which also, preferably, carries thearmature-wheel h. The armature-wheel might be upon a separate shaft,geared to the type-wheel shaft. The

armature-wheel is made with the required number of armatures to formboth a motor and a stop or holder to the type-wheel. I prefer to employan armature-wheel made with radial armatures revolving between the polesof two electro-ma-gnets, as shown; but there might be more than twoelectrormagnets, and the armatures may be arranged cylindrically orconically and the electro-magnets be placed around the wheel. In eithercase the electromagnets act as motors and holders to the type-wheelwithout the intervention of lovers or escapements or pallets; and thenumber of spaces -or characters on the type-wheel is a multiple of thenumber of the armatures and electro-magnets. The pairs of helices 7c 70and l l and their respective cores compose the typewheel magnets, andthe helices 7c are in the same circuit as the helix a, and the helices lare in the same circuit as the helix 1), as seen in Fig. 1. Thebinding-screws 1 2 3 4 receive the respective wires, the screws 1 2being for the line-wires connecting to the pulsator; and the screws 3 4receiving the wires to the next instrument or to the earth-circuit. Ihave shown a circuit-changer composed of the toothed disks m n with thecircuit-closer5 to the battery p. This circuit-changer is revolved bysuitable means and sends a current from p alternately through 70 a and lb, actuating the armature-wheel and type-wheel with whatever rapidity ofrevolution is given to the disks m n,- and when thedisks are stopped thetypewheel is held firmly by the magnet that is energized acting upon thewheel-armature that is contiguous thereto. The ratchet-wheel 22 and pawl23 prevent the type-wheel revolving backward when started, and the partsare so positioned that the armature-wheel is stopped with the armaturethat is next to be attracted slightly nearer to its core soas to beoperative in renewing the revolution. To eflect the printing it is onlynecessary to energize the other core, a or b, one helix and core beinginsuflicient to move the printing-lever. To effect this I employ acontact-spring, 1", key 10, and connections to the battery 11; so thaton sending a current by closing the key 10 the printing will beeffected. In this case care must be taken to make the connections, sothat the polarity in the electro-magnets a b is the same. It will beevident that the circuit closed by the key, although going through theother magnet 70 or I, will not move the type-wheel, because the magnetat which the type-wheel was stopped exerts the superior force upon thearmature that is contiguous thereto. Both circuit-s'are broken torelieve the printing-lever after ,the impression. The printing-lever dis provided with the impression-pad 16, and the paper is guided at 17and passes nearly vcr- Upon the type-wheel shaft f is an arm, 26, and

a hinged bow, at, is provided with an arm, 24:, that ordinarily is keptfrom contact with the said arm 26 by a spring, 27 but when both magnets70 l are energized the force is sufficient to draw down the bow a, onemagnet alone beinginsufficient. In this condition the magnets l 70 arealternately energized to move the type-wheel around until arrested bythe unisonarm 26 stopping against 24. Each one of said magnets retainsthe bow by its own magnetism until the next magnet is energized. It isdesirable that the printing-magnet should not 'be energized when the bowis attracted by the magnets 70 Zwhen setting the instruments at unison.For this purpose a reverse current is sent through the key t, which iseffective in attracting the bow a, but is neutral in operating theprinting-lever.

I claim as my invention- 1. An armature-wheel revolved byelectromagnets, and arrested by either of the electromagnets when itscircuit is not broken, in combination with a type-wheel and printingmechanism, substantially as set forth.

2. An electro-motor composed of two electromagnets in separate circuits,in combination with a printing-magnet the helices of which are in thesame circuits as the motor-magnets, substantially as specified.

3. The printing-lever and impression-pad, in combination with aholding-pawl, operated, substantially as set forth, for drawing thepaper over the pad by the movement of the printing-lever.

4. The unison mechanism, first operated by the joint action of the twoelectro-magnets that revolve the type-wheel, and held in operation byeither of the magnets as alternately energized, substantially as setforth.

5. An electro-magnet with the two helices or coils in separate electriccircuits, which circuits are separately employed for differentoperations, but jointly to operate the said electromagnet, substantiallyas specified.

Signed by me this 18th day of July, A. D.

HENRY VAN HOEVENB ERGH.

WVitn esses:

GEO. T. PrNcKNEY, CHAS. H. SMITH.

